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提出了一种利用两种不同温度系数的光纤光栅对来对解调仪的不稳定性进行改进的方法,并进行了理论分析,研究了影响该解调仪稳定性的几个因素.将所研制的传感器布设在东海大桥上,组成传感网络,并用改进后的光纤光栅解调系统对传感器的信号进行解调.在大桥竣工测试时,该传感解调系统表现出较好的性能.
A method of improving the instability of the demodulator by using two kinds of fiber grating with different temperature coefficients is proposed and the theoretical analysis is carried out to study several factors that affect the stability of the demodulator. The sensor was deployed on the East China Sea Bridge to form a sensor network, and the sensor signal was demodulated with the improved FBG demodulation system.The sensor demodulation system showed good performance when the bridge was completed and tested.